CODEWITHSUNDEEP
c++
jammer312
jammer312

Reputation: 47

C++ class : undefined reference to method

I have some class called gSprite that allows easy manipulation of image , manipulation and etc. As I completed some of it's functions and fixed all errors, I tried to use it and got others. Here is class custom creators

gSprite *  crGSprite(sf::Sprite * sprsource){
return new gSprite(sprsource);
}
gSprite *  crGSprite(sf::Sprite * sprsource,int sx, int sy){
return new gSprite(sprsource,sx,sy);
}
gSprite *  crGSprite(std::vector<sf::Sprite> spr,int sx,int sy){
return new gSprite(spr,sx,sy);
}

All creators are just construct new object and return reference to it. Then I have function for storing data about all files and create them in other file, that can reach these creators:

gSprite * loadsprite(string path)
{
    sf::Sprite sprite;
    sf::Texture tex;
    tex.loadFromFile(path);
    sprite.setTexture(tex);
    gSprite * gspr = crGSprite(&sprite);
    addGSprite(gspr);
    return gspr;
}

And all fine. BUT. Class also contains some functions.For some reason when I try to execute update(), it works, but when I trying to execute setPosition() it fails with "undefined reference to gSprite::setPosition(int,int). Here is these two functions and .hpp file:

void update()
{
    sprite = anim_sprites[num];
    sprite.setPosition(sf::Vector2f(x,y));
    return;
}

and 

void setPosition(int nx,int ny)
{
    x=nx;
    y=ny;
    return;
}

hpp:

#ifndef Sprites_H_
#define Sprites_H_

extern sf::RenderWindow * windowsrc;
class gSprite {
    int x;
    int y;
    sf::Sprite sprite;
    std::vector<sf::Sprite> anim_sprites;
    sf::Vector2f size;
    bool anim;
    int num;
public:
    gSprite(sf::Sprite * sprsource);
    gSprite(sf::Sprite * sprsource,int sx, int sy);
    gSprite(std::vector<sf::Sprite> spr,int sx,int sy);
    void setSize(float x, float y);
    void resize(float x,float y);
    void scale(float x,float y);
    void draw_s();
    void update();
    void move(int nx,int ny);
    void setPosition(int nx,int ny);
};

gSprite * crGSprite(sf::Sprite * sprsource);
gSprite * crGSprite(sf::Sprite * sprsource,int sx, int sy);
gSprite * crGSprite(std::vector<sf::Sprite> spr,int sx,int sy);
void addGSprite(gSprite * sprtsource);
void drawGSprites();

#endif /* Sprites_H_ */

I declare methods inside class declaration

Upvotes: 0

Views: 919

Answers (1)

Wyzard
Wyzard

Reputation: 34591

When you write

void setPosition(int nx,int ny)
{
    x=nx;
    y=ny;
    return;
}

you're defining a standalone function that's not part of any class. To implement the member function declared in the gSprite class, you have to write

void gSprite::setPosition(int nx,int ny)
{
    x=nx;
    y=ny;
    return;
}

Upvotes: 2

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